660477 has 8 divisors (see below), whose sum is σ = 887616. Its totient is φ = 436832.

The previous prime is 660449. The next prime is 660493. The reversal of 660477 is 774066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660477 - 2⁷ = 660349 is a prime.

660477 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393 + ... + 1214.

It is an arithmetic number, because the mean of its divisors is an integer number (110952).

2⁶⁶⁰⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

660477 is a deficient number, since it is larger than the sum of its proper divisors (227139).

660477 is a wasteful number, since it uses less digits than its factorization.

660477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 660477 is about 812.6973606454. The cubic root of 660477 is about 87.0868468220.

The spelling of 660477 in words is "six hundred sixty thousand, four hundred seventy-seven".